Of the five vows (Panch Anuvratas) of Jainism, four existed before Mahavira. The one which he added was

The correct answer is: A. not to kill (non-injury)

The five vows (Panch Anuvratas) of Jainism are:

1. Ahimsa: non-violence or non-injury to any living being.
2. Satya: truthfulness.
3. Asteya: non-stealing.
4. Brahmacharya: celibacy or chastity.
5. Aparigraha: non-possession or non-attachment to worldly things.

Of these, the vow of non-violence was added by Mahavira. The other four vows existed before him.

Mahavira was a 6th-century BCE Indian philosopher and reformer who founded Jainism. He is considered the 24th Tirthankara, or spiritual teacher, of Jainism.

Mahavira’s teachings emphasize the importance of non-violence, truthfulness, non-stealing, celibacy, and non-possession. He taught that these vows are essential for achieving liberation from the cycle of rebirth.

Mahavira’s teachings have had a profound impact on Jainism and have influenced the development of other religions, such as Buddhism.